Nonpositional indicator for switchboards



NOV. 25, 1947. ALPERESLl-zem 2,431,341

NON-FOSITIONAL INDICATOR FOR" SWITCHBOARDS Filed Jan. 25, 1946 F IG. 3.

INVENTOR.

ANATOL PERESLEG'IN Patented Nov. 25, 1947 UNITED STATES, PATENT OFFICE NONPOSITIONAL INDICATOR FUR SWITCHBOARDS Anatol Pereslegin, Freehold, N. J assignor to the United States of America, as represented by the Secretary of War Application January 25, 1946, Serial No. 643,442

(Granted under the act of March 3, 1883, as

1 Claim.

amended April 30, 1928; 370 0. G. 757) The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to telephone drops and in character, whereby the said drop will be operative when positioned at any angle to the horizontal. It is another object of the invention to provide such a drop that will be automatically restored to its normal non-indicative position when connection is mad to the telephone jack associated with the drop.

These objects, together with other objects and advantages of the invention that will be apparent to one skilled in the art, are achieved in a preferred embodiment of the invention by means of a rotatable indicator disc, the said disc being released to rotate by means responsive to an incoming signal. Means are provided associated therewith whereby the said disc will be restored to its normal non-indicative position upon insertion of a telephone plug into the jack associated with said drop, and the disc will then be locked in position by the above named responsive means.

For a, better understanding of the invention, reference is made to the following specification of a device embodying the invention, the said specification to be read in connection With the accompanying drawings, in which Figure 1 is a side elevational View of a device embodying the invention, the device being shown in its normal position, and

Figure 2 is a front elevational view of the device shown in Figure 1, and

Figure 3 is a side elevational view of a portionv of the device shown in Figure 1, and shows the device in its indicating position.

Referring to the drawings, the drop includes a drop coil I forming a part of a telephone line [2, an armature l4 and a rotatable disc l6. The armature is eccentrically pivoted from a support ill by means of trunnions l9 and is normally tilted in a forwardly inclined position by means of a helical spring 20 having its rearward end fixed to an attachment member 22 which may be afiixed to the coil 16 by any suitable means. The support It! is rigidly fixed to the attachment member 22 by rivets 24.

The disc [6 is rotatably mounted on an axle 26 fixed to a downwardly extending flange 28 of the support I8, and is provided with a semi-circular aperture 36 adapted to receive a forward- 1y extending pin 32 fixed to the forward face of the armature I l. The flange 28 is provided with a longitudinal slot 34 adapted to permit passage therethrough of the said pin 32..

A rotational stop 36 is fixed to the rearward face of the disc l6 immediately above the aperture 3B. A flat spring 38 is positioned about the face of'the disc l6, one end thereof being afiixed to the axle 26 and the other end thereof being fixed to a lug 40 that isfixed to the periphery of the disc l6 substantially degrees in a counter clockwise direction from the aperture 36.

Positioned between the disc l6 and the flange 28 is a jointed three armed rocker 42 having the arms thereof rotatably connected together, the lower arm 44 being pivotly connected to a lower v.right corner of the flange 28 and the upper arm 46 being pivotly connected at a mid-point thereof to the upper portion of said flange. The upper arm 46 is hook-shaped and when the drop is not in use extends downwardly to within 90 degrees of the rotation stop 36. The two said arms M and 46 are pivotly connected by the arm 48.

The drop is mounted in a switchboard (not shown) in association with a standard telephone jack 50 and is provided with a pivotable lever arm 52 adapted to be actuated by upward movement of a jack terminal arm 54, the said upward movement resulting from insertion of a telephone jack into the plug 50. The free end of said lever arm 52 extends forwardly beyond the lower arm 44 of the rocker 42 and is contiguous to the lower surface thereof.

A signal placed on the telephone line 12 will pass through the coil It], the resultant magnetic field of which will attract the armature l4 and cause it to pivotly swing toward the coil 10. Movement of the armature I4 will withdraw the pin 32 from the aperture 36 and thereby release the disc I 6 to rotate due to the action of the spring 38. A marker, such as the arrow 56, is provided on the face of the disc l6 whereby displacement of the disc I6 may be more readily apparent to the switchboard operator.

The disc IE will rotate counter-clockwise, due to the spring 38, until the rotation stop 36 has moved into engagement with the lower end of the hook shaped arm 46 of rocker 42. The disc I6 is thereby displaceablethrough 90 degrees and it will therefore be visually obvious to the switchboard operator that; rjotation'has occurred. I 7

It will be apparntthat rotation" of the indicator disc [6 is in no manner dependent upon the position of the switchboard with respectgto the horizontal, but is actuated, solely by the, spring 38 when the pin 32 is withdrawn fronfap What is claimed is: p A non-positional and automatically restorable telephone drop to indicate an incoming signal on fa telephonefline; the said drop being mounted on 5 i a='switchb"oardin association virithz a telephone jack adapted to receive a telephone plug, com-' i 'prising an apertured indicator disc free to rotate I about an axle; a distorted fiat spring having one end-connected to said axle and having the other erture 30. The device is therefore non-positional io"end connected to said disc whereby said disc may and is well adapted for use in field or'mobile'installations. I

Having been made aware of the incoming signal by rotational displacement of disc Hi, the switchboard operator completes the circuit through his operators set by inserting a'telephone plug into the jack 50, which action results in upward movement of t'he lever 'armfiiz. npward movement of arm 52 willbe"translat'ed 20 rocker arrangement having a terminal end therethrough the rocker 42' to downward movement of the hook'shaped-airri l6 Sincethelower end j arrril qd'is ifi*enfgagenfientfwithth 'stop"36,- the disc 16' will berotatia'l' cl wise untilthe' pin 32 'edfi' S'ince; at [this 1 2, wearing 'r' l' fisf to be tilted forwardly "'dilejtoithe acjtio "of'the prfng'izo and the pin 32 tqfi e ap'rture sagmemw lockin' place i ili wi ie *ing the disc be automatically re to its normal non-indiating position.-' Th ansarepositive in action 'andrequire no act on he par t of the switchboard i e e e r beer t 1 plu i t 350 v. a ehas'thu "beenprovided a telephone drop th nines- ,I hhdifl ei a q ifications-f'o thedevice herein disclosed iwlll' be appaifentz tofone skilled in the oved from the line;

he necessary *actof insert-- Niii e o '1 be urged to rotateya pivoted armature having a forwardly 'Je'xtcanding pin adapted to be received 7 by-igajid aperturedzdisc in its normal position, the

said armature being urged toward said disc by a 1 helical s'p'ring;' a drop coil connected in said telephone line whereby said coil will be energized by said incoming signal and said armature and pin fwill be moved toward said coil, thereby removing 'said'pin"frormsaid aperture; a multiple armed 5 normal position and belocked therein-bys'aid pin when said signal has been removed from the'telephone line.

ANATOD' PERESLEGIN.

30 REFERENCES CITED The r 110'w ng; references-are of re'cordiii' the file of this patent: I

'-- UNITED STAT S PK'fni fTs 

